Dielectric and multilayer electronic device

Abstract

A dielectric includes a dielectric grain, a segregate, and a pore. The segregate and the pore are in contact to form a specific combination in a section of the dielectric. A multilayer electronic device includes a dielectric including a dielectric grain, a segregate, and a pore. The segregate and the pore are in contact to form a specific combination in a section of the dielectric.

What is claimed is: 
     
         1 . A dielectric comprising:
 a dielectric grain;   a segregate; and   a pore,   wherein the segregate and the pore are in contact to form a specific combination in a section of the dielectric.   
     
     
         2 . The dielectric according to  claim 1 , wherein the pore of the specific combination has a size smaller than that of the segregate of the specific combination. 
     
     
         3 . The dielectric according to  claim 1 , wherein an average size of the segregate divided by an average size of the pore is more than 1.00 and 6.00 or less. 
     
     
         4 . The dielectric according to  claim 1 , wherein a number ratio of the specific combination in the section of the dielectric is 2.0×10 4  or more and 5.0×10 6  or less per mm 2 . 
     
     
         5 . The dielectric according to  claim 1 , wherein the segregate has a linear expansion coefficient smaller than that of the dielectric grain. 
     
     
         6 . The dielectric according to  claim 1 , wherein an element that the segregate comprises the most in terms of atomicity other than O, Ca, Sr, Zr, and Ti is Si. 
     
     
         7 . The dielectric according to  claim 1 , wherein the dielectric grain has a grain size of 0.10 μm or more and 3.00 μm or less. 
     
     
         8 . The dielectric according to  claim 1 , wherein the dielectric grain comprises a component represented by a composition formula [(Ca x Sr 1-x )O] n [(Ti y Zr 1-y )O 2 ]. 
     
     
         9 . The dielectric according to  claim 1 , wherein the dielectric grain comprises barium titanate. 
     
     
         10 . A multilayer electronic device comprising the dielectric according to  claim 1 .